https://www.nytimes.com/2012/12/25/science/from-bang-to-whimper-a-heart-drugs-story.html
http://quillette.com/2017/06/11/no-voice-vox-sense-nonsense-discussing-iq-race/
https://archive.is/42v5Y
https://abc102.wordpress.com/2011/02/17/brain-size-and-correlates-with-iq/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2410101/?report=classic
https://www.youtube.com/watch?v=MOnQPXuU81Q